Indicate Whether Each of the Following Descriptions Better Applies to Equilibrium

Short Answer

Indicate whether each of the following descriptions better applies to equilibrium sedimentation (E) or velocity sedimentation (V). Your answer would be a four-letter string composed of letters E and V only, e.g. EEEE.
( ) It separates subcellular components based on their buoyant density.
( ) It can conveniently separate ¹⁵N-containing and ¹⁴N-containing DNA.
( ) It uses a shallow sucrose gradient to stabilize the sedimentation bands against convection.
( ) In this method, subcellular components may either move up or down to form discrete bands.